gall midge vs gall gnat

gall midge and gall gnat both are nouns.

Word	Noun	Adjective	Verb	Adverb
gall midge	Yes	No	No	No
gall gnat	Yes	No	No	No

As nouns, gall midge and gall gnat are synonyms defined as:

gall midge and gall gnat: fragile mosquito-like flies that produce galls on plants

Other synonyms of gall midge include gallfly.

gall midge (noun)	gall gnat (noun)
fragile mosquito-like flies that produce galls on plants	fragile mosquito-like flies that produce galls on plants